<template>
  <el-dialog v-model="dialogVisible" :align-center="true" title="导入数据" width="600px" @close="handleClose">
    <el-scrollbar max-height="60vh">
      <el-form
        ref="importFormRef"
        label-width="auto"
        style="padding-right: var(--el-dialog-padding-primary)"
        :model="importFormData"
        :rules="importFormRules">
        <el-form-item label="文件名" prop="files">
          <el-upload
            class="w-full"
            ref="uploadRef"
            v-model:file-list="importFormData.files"
            accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel"
            :drag="true"
            :limit="1"
            :auto-upload="false"
            :on-exceed="handleFileExceed">
            <el-icon class="el-icon--upload"><upload-filled /></el-icon>
            <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
            <template #tip>
              <div class="el-upload__tip">
                *.xlsx / *.xls
                <el-link type="primary" icon="download" :underline="false" @click="handleDownloadTemplate">
                  下载模板
                </el-link>
              </div>
            </template>
          </el-upload>
        </el-form-item>
      </el-form>
    </el-scrollbar>
    <template #footer>
      <div style="padding-right: var(--el-dialog-padding-primary)">
        <el-button type="primary" :disabled="importFormData.files.length === 0" @click="handleSubmit">
          确 定
        </el-button>
        <el-button @click="handleClose">取 消</el-button>
      </div>
    </template>
  </el-dialog>
</template>

<script lang="ts" setup>
import { type UploadUserFile } from "element-plus"

import UserAPI from "@/api/user"

const props = defineProps({
  visible: {
    type: Boolean,
    default: false,
  },
})

const emit = defineEmits(["update:visible", "import-success"])

const dialogVisible = computed({
  get: () => props.visible,
  set: (val) => {
    emit("update:visible", val)
  },
})

const importFormRef = ref(null)
const uploadRef = ref(null)

const importFormData = reactive<{
  files: UploadUserFile[]
}>({
  files: [],
})

const importFormRules = {
  files: [{ required: true, message: "文件不能为空", trigger: "blur" }],
}

const handleClose = () => {
  dialogVisible.value = false
}

const handleSubmit = async () => {
  if (!importFormData.files.length) {
    ElMessage.warning("请选择文件")
    return
  }

  try {
    await UserAPI.import(1, importFormData.files[0].raw as File)
    ElMessage.success("上传成功")
    emit("import-success")
    handleClose()
  } catch (error) {
    ElMessage.error("上传失败")
  }
}

const handleFileExceed = () => {
  ElMessage.warning("只能上传一个文件")
}

const handleDownloadTemplate = () => {
  UserAPI.downloadTemplate().then((response: any) => {
    const fileData = response.data
    const fileName = decodeURI(response.headers["content-disposition"].split(";")[1].split("=")[1])
    const fileType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8"

    const blob = new Blob([fileData], { type: fileType })
    const downloadUrl = window.URL.createObjectURL(blob)

    const downloadLink = document.createElement("a")
    downloadLink.href = downloadUrl
    downloadLink.download = fileName

    document.body.appendChild(downloadLink)
    downloadLink.click()

    document.body.removeChild(downloadLink)
    window.URL.revokeObjectURL(downloadUrl)
  })
}
</script>
